Diagnostic for over-the-range or built-in microwaves. Common failures: door switches, magnetron, fuse. Magnetron replacement is often cost-prohibitive vs. replacement.
Sorted by total cost — service call plus repair.
If the diagnosis turns up something not in the price book, the contractor will send you a written estimate through the app before they start any work. You approve, decline, or ask questions. No approval, no charge beyond the service call fee.